NDVI Slider

An interactive NDVI slider that compares historical Landsat–5 data of the foothill area (about 80 square miles) north of Tucson. The embedded color photos were taken in spring 2013. The comparison shows that rapid urban development has reduced the amount of vegetation...

MDOW Hillshading

Hill shade image of USGS GTOPO30, satellite scene w140 n40 (Arizona, U.S. and northern Mexico). Here is a step-by-step...